A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 5985-01-634-0635
NSN 6110-01-317-3762
NSN 5998-00-233-6401
NSN 5985-01-246-0081
NSN 5990-00-484-3189
NSN 5905-01-099-9496
NSN 5975-01-108-7049
NSN 5915-01-090-0478
NSN 2925-01-597-9541
NSN 5905-01-207-3475
NSN 5999-01-442-7804
NSN 6240-01-407-0596